Federal Signal's SelecTone® Model 300 is a lightweight and compact, solid-state amplified speaker designed to amplify a pre-selected tone over existing ambient noises. The speaker cone and projector are made of spun aluminum. The internal amplifier circuitry and tone module are contained in a housing of die-cast aluminum. Dust- and moisture-proof gasketing provides protection from the elements. All external components are sealed with powder-coat paint.

SelecTone Amplified Speakers are used individually or as part of a plant-wide emergency notification system. The Model UTM Universal Tone Module, with 32 tones, or the TM33 Custom Tone Module is plugged into a single SelecTone Amplified Speaker for stand-alone use or into a SelecTone Command Unit for plant-wide signaling.

Model 300 speaker/amplifiers are ideally suited for full output tone signaling where voice paging is not a requirement. Typical applications include emergency warning, start and dismissal, general alarm, smelters and cranes.


Voltage 250VDC
Mount Surface
Operating Current 0.072 Amps at 250VDC
Operating Temperature Minimum -31 °F
Operating Temperature Maximum 151 °F
Decibel Output 110 @ 10 feet
120 @ 1 Meter
Enclosure Rating Type 3R
Height 12.400 in
Width 7.900 in
Depth 8.500 in
Net Weight 5 lb
Shipping Weight 6.10 lb


Product Literature
Product Manuals

Ordering Information

Model Types
Model Description UPC
300-250 SelecTone audible signal, 250VDC 782979200505
UTM Universal tone module 782979202172
TM33-SD Tone module, custom, Series D 782979227335
AM25CK Connector card, 25vrms 782979600855
AM70CK Connector card, 70vrms 782979600862
300CK Connector kit 782979391203
T-300CK 2.7 Vrms, 1 Vrms
E-300CK 1 Vrms, 1 Vrms
Replacement Parts
Description Part Number UPC
PCBA, 300-250 SelecTone K2001903B 782979125556
Voice coil, Series C K8593035A 782979121138
Speaker assembly, 15 watt, 4X, grey K8593082A 782979122531